CUTTING-OFF METHOD OF PRINTED WIRING BOARD AND FIBER REINFORCEMENT SYNTHETIC RESIN MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a cutting-off method of a printed wiring board and a fiber reinforcement synthetic resin material wherein tool life of a router is prolonged. SOLUTION: In a printed wiring board 11 which has reinforcement fiber fabric wherein strands orthogonally intersect each other and has a straight portion at least on a part of an outer peripheral shape cut out by router truncation, full length of each of the straight portions of the outer peripheral shape is classified in the orientations in which each of the straight portions is prolonged, and full length of each straight line contained in each sharing is integrated. Orientation where straight lines in a sharing in which the sum total length becomes the longest are prolonged has a tiit angle of at least 0.2°to orientations (arrows A and B) of the strands. It is more preferable that the tiit angle is at least 5°. COPYRIGHT: (C)2004,JPO